code: def replacer(graph):
      return getattr(graph.tag, "replacement", graph)
  
file_path: Theano/theano/scan_module/tests/test_scan_utils.py
imports: from __future__ import absolute_import, print_function, division
  import itertools
  import unittest
  import numpy
  import theano
  from theano import tensor
  from theano.scan_module.scan_utils import equal_computations, map_variables
  from theano.tensor.type_other import NoneConst
label_desc: Use image node_id 1 for calling the TestMapVariables obj's underlying member method code with example usage: obj.replacer(graph) and returns: getattr